Now the file image(s) automatically will start without any problem (ROM protection and/or BLK1 issue)

If the "cartridge" does not use a file image for BLK5 you need to type the proper SYS command.

This procedure can be used to load any cartridge file image even if it is unprotected or doesn't have BLK1 issues. By the way, in this case after the file image(s) are loaded, to quickly start the ROM for BLK5 you may perform a Vic-20 soft reset by using this command:SYS64802